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Finding the Fourth Proportional to 140,528.70, 210,793.05 and 81,479.70

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Solution

The fourth proportional to 140,528.70, 210,793.05 and 81,479.70 is: 122,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,528.70 : 210,793.05 = 81,479.70 : x
  2. Step 2: Convert to fraction form
    140,528.70/210,793.05 = 81,479.70/x
  3. Step 3: Cross multiply
    140,528.70x = 210,793.05 × 81,479.70
  4. Step 4: Simplify right side
    140,528.70x = 17,175,354,476.09
  5. Step 5: Solve for x
    x = 17,175,354,476.09/140,528.70
  6. Step 6: Final answer
    x = 122,219.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.